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author | Tejun Heo <htejun@gmail.com> | 2007-08-06 18:36:22 +0900 |
---|---|---|
committer | Jeff Garzik <jeff@garzik.org> | 2007-10-12 14:55:30 -0400 |
commit | 9af5c9c97dc9d599281778864c72b385f0c63341 (patch) | |
tree | 8359986bd42c4a9a5b1993078aa9ee4c7971ac3d /drivers/ata/libata-scsi.c | |
parent | 640fdb504941fa2b9f6f274716fc9f97f2bf6bff (diff) | |
download | op-kernel-dev-9af5c9c97dc9d599281778864c72b385f0c63341.zip op-kernel-dev-9af5c9c97dc9d599281778864c72b385f0c63341.tar.gz |
libata-link: introduce ata_link
Introduce ata_link. It abstracts PHY and sits between ata_port and
ata_device. This new level of abstraction is necessary to support
SATA Port Multiplier, which basically adds a bunch of links (PHYs) to
a ATA host port. Fields related to command execution, spd_limit and
EH are per-link and thus moved to ata_link.
This patch only defines the host link. Multiple link handling will be
added later. Also, a lot of ap->link derefences are added but many of
them will be removed as each part is converted to deal directly with
ata_link instead of ata_port.
This patch introduces no behavior change.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: James Bottomley <James.Bottomley@SteelEye.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata/libata-scsi.c')
-rw-r--r-- | drivers/ata/libata-scsi.c | 41 |
1 files changed, 21 insertions, 20 deletions
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index e836476..ec0e263 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -1368,14 +1368,14 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) case ATA_CMD_SET_FEATURES: if ((qc->tf.feature == SETFEATURES_WC_ON) || (qc->tf.feature == SETFEATURES_WC_OFF)) { - ap->eh_info.action |= ATA_EH_REVALIDATE; + ap->link.eh_info.action |= ATA_EH_REVALIDATE; ata_port_schedule_eh(ap); } break; case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */ case ATA_CMD_SET_MULTI: /* multi_count changed */ - ap->eh_info.action |= ATA_EH_REVALIDATE; + ap->link.eh_info.action |= ATA_EH_REVALIDATE; ata_port_schedule_eh(ap); break; } @@ -1439,14 +1439,14 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) */ static int ata_scmd_need_defer(struct ata_device *dev, int is_io) { - struct ata_port *ap = dev->ap; + struct ata_link *link = dev->link; int is_ncq = is_io && ata_ncq_enabled(dev); if (is_ncq) { - if (!ata_tag_valid(ap->active_tag)) + if (!ata_tag_valid(link->active_tag)) return 0; } else { - if (!ata_tag_valid(ap->active_tag) && !ap->sactive) + if (!ata_tag_valid(link->active_tag) && !link->sactive) return 0; } return 1; @@ -2426,7 +2426,7 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc) static struct ata_device * ata_find_dev(struct ata_port *ap, int id) { if (likely(id < ATA_MAX_DEVICES)) - return &ap->device[id]; + return &ap->link.device[id]; return NULL; } @@ -2458,7 +2458,7 @@ static int ata_scsi_dev_enabled(struct ata_device *dev) if (unlikely(!ata_dev_enabled(dev))) return 0; - if (!atapi_enabled || (dev->ap->flags & ATA_FLAG_NO_ATAPI)) { + if (!atapi_enabled || (dev->link->ap->flags & ATA_FLAG_NO_ATAPI)) { if (unlikely(dev->class == ATA_DEV_ATAPI)) { ata_dev_printk(dev, KERN_WARNING, "WARNING: ATAPI is %s, device ignored.\n", @@ -2961,7 +2961,7 @@ void ata_scsi_scan_host(struct ata_port *ap, int sync) for (i = 0; i < ATA_MAX_DEVICES; i++) { struct scsi_device *sdev; - dev = &ap->device[i]; + dev = &ap->link.device[i]; if (!ata_dev_enabled(dev) || dev->sdev) continue; @@ -2978,7 +2978,7 @@ void ata_scsi_scan_host(struct ata_port *ap, int sync) * whether all devices are attached. */ for (i = 0; i < ATA_MAX_DEVICES; i++) { - dev = &ap->device[i]; + dev = &ap->link.device[i]; if (ata_dev_enabled(dev) && !dev->sdev) break; } @@ -3049,7 +3049,7 @@ int ata_scsi_offline_dev(struct ata_device *dev) */ static void ata_scsi_remove_dev(struct ata_device *dev) { - struct ata_port *ap = dev->ap; + struct ata_port *ap = dev->link->ap; struct scsi_device *sdev; unsigned long flags; @@ -3123,7 +3123,7 @@ void ata_scsi_hotplug(struct work_struct *work) /* unplug detached devices */ for (i = 0; i < ATA_MAX_DEVICES; i++) { - struct ata_device *dev = &ap->device[i]; + struct ata_device *dev = &ap->link.device[i]; unsigned long flags; if (!(dev->flags & ATA_DFLAG_DETACHED)) @@ -3162,6 +3162,7 @@ static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, unsigned int id, unsigned int lun) { struct ata_port *ap = ata_shost_to_port(shost); + struct ata_eh_info *ehi = &ap->link.eh_info; unsigned long flags; int rc = 0; @@ -3175,15 +3176,15 @@ static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel, spin_lock_irqsave(ap->lock, flags); if (id == SCAN_WILD_CARD) { - ap->eh_info.probe_mask |= (1 << ATA_MAX_DEVICES) - 1; - ap->eh_info.action |= ATA_EH_SOFTRESET; + ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1; + ehi->action |= ATA_EH_SOFTRESET; } else { struct ata_device *dev = ata_find_dev(ap, id); if (dev) { - ap->eh_info.probe_mask |= 1 << dev->devno; - ap->eh_info.action |= ATA_EH_SOFTRESET; - ap->eh_info.flags |= ATA_EHI_RESUME_LINK; + ehi->probe_mask |= 1 << dev->devno; + ehi->action |= ATA_EH_SOFTRESET; + ehi->flags |= ATA_EHI_RESUME_LINK; } else rc = -EINVAL; } @@ -3220,7 +3221,7 @@ void ata_scsi_dev_rescan(struct work_struct *work) spin_lock_irqsave(ap->lock, flags); for (i = 0; i < ATA_MAX_DEVICES; i++) { - struct ata_device *dev = &ap->device[i]; + struct ata_device *dev = &ap->link.device[i]; struct scsi_device *sdev = dev->sdev; if (!ata_dev_enabled(dev) || !sdev) @@ -3359,7 +3360,7 @@ EXPORT_SYMBOL_GPL(ata_sas_port_destroy); int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) { ata_scsi_sdev_config(sdev); - ata_scsi_dev_config(sdev, ap->device); + ata_scsi_dev_config(sdev, ap->link.device); return 0; } EXPORT_SYMBOL_GPL(ata_sas_slave_configure); @@ -3382,8 +3383,8 @@ int ata_sas_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), ata_scsi_dump_cdb(ap, cmd); - if (likely(ata_scsi_dev_enabled(ap->device))) - rc = __ata_scsi_queuecmd(cmd, done, ap->device); + if (likely(ata_scsi_dev_enabled(ap->link.device))) + rc = __ata_scsi_queuecmd(cmd, done, ap->link.device); else { cmd->result = (DID_BAD_TARGET << 16); done(cmd); |